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Constituted by the INA102 and PGA102 of programmable instrum

2015-01-01 12:12  
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Constituted by the INA102 and PGA102 of programmable instrumentation amplifier
Constituted by the INA102 and PGA102 of programmable instrumentation amplifier circuit as shown: As shown by INA102 and PGA102 a programmable instrumentation amplifier. This circuit uses the INA102 and PGA102 cascade, INA102 gain of 1, while the PGA102 gain selectable. The circuit is characterized by the use INA102 input impedance matching and signal sources, while using a microprocessor using PGA102 programmable gain characteristics of its choice. INA102 inputs, respectively, with four diode limiter, input overvoltage to prevent damage to the internal circuitry. Diode leakage current must be selected pipe, otherwise leakage current will weaken the signal attenuation that can not amplify weak signals. D for input protection diode, use FDH300 (low leakage current).